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7e272fcf JL |
1 | /* |
2 | * lib80211.h -- common bits for IEEE802.11 wireless drivers | |
3 | * | |
4 | * Copyright (c) 2008, John W. Linville <linville@tuxdriver.com> | |
5 | * | |
274bfb8d JL |
6 | * Some bits copied from old ieee80211 component, w/ original copyright |
7 | * notices below: | |
8 | * | |
9 | * Original code based on Host AP (software wireless LAN access point) driver | |
10 | * for Intersil Prism2/2.5/3. | |
11 | * | |
12 | * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen | |
13 | * <j@w1.fi> | |
14 | * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> | |
15 | * | |
16 | * Adaption to a generic IEEE 802.11 stack by James Ketrenos | |
17 | * <jketreno@linux.intel.com> | |
18 | * | |
19 | * Copyright (c) 2004, Intel Corporation | |
20 | * | |
7e272fcf JL |
21 | */ |
22 | ||
23 | #ifndef LIB80211_H | |
24 | #define LIB80211_H | |
25 | ||
274bfb8d JL |
26 | #include <linux/types.h> |
27 | #include <linux/list.h> | |
60063497 | 28 | #include <linux/atomic.h> |
274bfb8d JL |
29 | #include <linux/if.h> |
30 | #include <linux/skbuff.h> | |
72118015 | 31 | #include <linux/ieee80211.h> |
a1eb5fe3 | 32 | #include <linux/timer.h> |
6bbefe86 DH |
33 | #include <linux/seq_file.h> |
34 | ||
274bfb8d JL |
35 | #define NUM_WEP_KEYS 4 |
36 | ||
37 | enum { | |
38 | IEEE80211_CRYPTO_TKIP_COUNTERMEASURES = (1 << 0), | |
39 | }; | |
40 | ||
de477254 PG |
41 | struct module; |
42 | ||
274bfb8d JL |
43 | struct lib80211_crypto_ops { |
44 | const char *name; | |
45 | struct list_head list; | |
46 | ||
47 | /* init new crypto context (e.g., allocate private data space, | |
48 | * select IV, etc.); returns NULL on failure or pointer to allocated | |
49 | * private data on success */ | |
50 | void *(*init) (int keyidx); | |
51 | ||
52 | /* deinitialize crypto context and free allocated private data */ | |
53 | void (*deinit) (void *priv); | |
54 | ||
274bfb8d JL |
55 | /* encrypt/decrypt return < 0 on error or >= 0 on success. The return |
56 | * value from decrypt_mpdu is passed as the keyidx value for | |
57 | * decrypt_msdu. skb must have enough head and tail room for the | |
58 | * encryption; if not, error will be returned; these functions are | |
59 | * called for all MPDUs (i.e., fragments). | |
60 | */ | |
61 | int (*encrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv); | |
62 | int (*decrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv); | |
63 | ||
64 | /* These functions are called for full MSDUs, i.e. full frames. | |
65 | * These can be NULL if full MSDU operations are not needed. */ | |
66 | int (*encrypt_msdu) (struct sk_buff * skb, int hdr_len, void *priv); | |
67 | int (*decrypt_msdu) (struct sk_buff * skb, int keyidx, int hdr_len, | |
68 | void *priv); | |
69 | ||
70 | int (*set_key) (void *key, int len, u8 * seq, void *priv); | |
71 | int (*get_key) (void *key, int len, u8 * seq, void *priv); | |
72 | ||
73 | /* procfs handler for printing out key information and possible | |
74 | * statistics */ | |
6bbefe86 | 75 | void (*print_stats) (struct seq_file *m, void *priv); |
274bfb8d JL |
76 | |
77 | /* Crypto specific flag get/set for configuration settings */ | |
78 | unsigned long (*get_flags) (void *priv); | |
79 | unsigned long (*set_flags) (unsigned long flags, void *priv); | |
80 | ||
81 | /* maximum number of bytes added by encryption; encrypt buf is | |
82 | * allocated with extra_prefix_len bytes, copy of in_buf, and | |
83 | * extra_postfix_len; encrypt need not use all this space, but | |
84 | * the result must start at the beginning of the buffer and correct | |
85 | * length must be returned */ | |
86 | int extra_mpdu_prefix_len, extra_mpdu_postfix_len; | |
87 | int extra_msdu_prefix_len, extra_msdu_postfix_len; | |
88 | ||
89 | struct module *owner; | |
90 | }; | |
91 | ||
92 | struct lib80211_crypt_data { | |
93 | struct list_head list; /* delayed deletion list */ | |
94 | struct lib80211_crypto_ops *ops; | |
95 | void *priv; | |
96 | atomic_t refcnt; | |
97 | }; | |
98 | ||
99 | struct lib80211_crypt_info { | |
100 | char *name; | |
101 | /* Most clients will already have a lock, | |
102 | so just point to that. */ | |
103 | spinlock_t *lock; | |
104 | ||
105 | struct lib80211_crypt_data *crypt[NUM_WEP_KEYS]; | |
106 | int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */ | |
107 | struct list_head crypt_deinit_list; | |
108 | struct timer_list crypt_deinit_timer; | |
109 | int crypt_quiesced; | |
110 | }; | |
111 | ||
2ba4b32e JL |
112 | int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name, |
113 | spinlock_t *lock); | |
114 | void lib80211_crypt_info_free(struct lib80211_crypt_info *info); | |
274bfb8d JL |
115 | int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops); |
116 | int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops); | |
117 | struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name); | |
274bfb8d JL |
118 | void lib80211_crypt_delayed_deinit(struct lib80211_crypt_info *info, |
119 | struct lib80211_crypt_data **crypt); | |
274bfb8d | 120 | |
7e272fcf | 121 | #endif /* LIB80211_H */ |